Polk County is a county located in the southwestern portion of the U.S. state of Missouri. As of the 2020 census, the population was 31,519. Its county seat is Bolivar. The county was organized January 5, 1835, and named for Ezekiel Polk.

Dade County is a county located in the southwest part of the U.S. state of Missouri. As of the 2020 census, the population was 7,569. Its county seat is Greenfield. The county was organized in 1841 and named after Major Francis L. Dade of Virginia, who was killed in the Second Seminole War in 1835.